From 4c11e1ad1235206e5f5e638e48456ca0d4901466 Mon Sep 17 00:00:00 2001
From: brian <brian@openbsd.org>
Date: Sun, 2 Apr 2000 01:36:20 +0000
Subject: [PATCH] Make the default ``nat target'' address INADDR_NONE, meaning
 incoming connections go to the NAT address.  Make a ``nat target'' address of
 INADDR_ANY allow connections from outside directly into the internal network.

Change some s_addr == 0 to s_addr == INADDR_ANY
---
 usr.sbin/ppp/ppp/alias_db.c | 28 +++++++++++++++-------------
 usr.sbin/ppp/ppp/nat_cmd.c  |  4 ++--
 2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/usr.sbin/ppp/ppp/alias_db.c b/usr.sbin/ppp/ppp/alias_db.c
index d299b0ec1e0..ecb99645a0b 100644
--- a/usr.sbin/ppp/ppp/alias_db.c
+++ b/usr.sbin/ppp/ppp/alias_db.c
@@ -105,7 +105,7 @@
 
     See HISTORY file for additional revisions.
 
-    $OpenBSD: alias_db.c,v 1.7 2000/03/19 10:33:32 brian Exp $
+    $OpenBSD: alias_db.c,v 1.8 2000/04/02 01:36:20 brian Exp $
 */
 
 
@@ -863,7 +863,7 @@ AddLink(struct in_addr  src_addr,
         link->src_addr          = src_addr;
         link->dst_addr          = dst_addr;
         link->alias_addr        = alias_addr;
-        link->proxy_addr.s_addr = 0;
+        link->proxy_addr.s_addr = INADDR_ANY;
         link->src_port          = src_port;
         link->dst_port          = dst_port;
         link->proxy_port        = 0;
@@ -893,7 +893,7 @@ AddLink(struct in_addr  src_addr,
         }
 
     /* Determine alias flags */
-        if (dst_addr.s_addr == 0)
+        if (dst_addr.s_addr == INADDR_ANY)
             link->flags |= LINK_UNKNOWN_DEST_ADDR;
         if (dst_port == 0)
             link->flags |= LINK_UNKNOWN_DEST_PORT;
@@ -1127,7 +1127,7 @@ _FindLinkIn(struct in_addr dst_addr,
    loop will have to know about this. */
 
     flags_in = 0;
-    if (dst_addr.s_addr == 0)
+    if (dst_addr.s_addr == INADDR_ANY)
         flags_in |= LINK_UNKNOWN_DEST_ADDR;
     if (dst_port == 0)
         flags_in |= LINK_UNKNOWN_DEST_PORT;
@@ -1455,14 +1455,16 @@ FindOriginalAddress(struct in_addr alias_addr)
     if (link == NULL)
     {
         newDefaultLink = 1;
-        if (targetAddress.s_addr != 0)
-            return targetAddress;
-        else
+        if (targetAddress.s_addr == INADDR_ANY)
             return alias_addr;
+        else if (targetAddress.s_addr == INADDR_NONE)
+            return aliasAddress;
+        else
+            return targetAddress;
     }
     else
     {
-        if (link->src_addr.s_addr == 0)
+        if (link->src_addr.s_addr == INADDR_ANY)
             return aliasAddress;
         else
             return link->src_addr;
@@ -1483,7 +1485,7 @@ FindAliasAddress(struct in_addr original_addr)
     }
     else
     {
-        if (link->alias_addr.s_addr == 0)
+        if (link->alias_addr.s_addr == INADDR_ANY)
             return aliasAddress;
         else
             return link->alias_addr;
@@ -1601,7 +1603,7 @@ GetStateOut(struct alias_link *link)
 struct in_addr
 GetOriginalAddress(struct alias_link *link)
 {
-    if (link->src_addr.s_addr == 0)
+    if (link->src_addr.s_addr == INADDR_ANY)
         return aliasAddress;
     else
         return(link->src_addr);
@@ -1618,7 +1620,7 @@ GetDestAddress(struct alias_link *link)
 struct in_addr
 GetAliasAddress(struct alias_link *link)
 {
-    if (link->alias_addr.s_addr == 0)
+    if (link->alias_addr.s_addr == INADDR_ANY)
         return aliasAddress;
     else
         return link->alias_addr;
@@ -2139,8 +2141,8 @@ PacketAliasInit(void)
         deleteAllLinks = 0;
     }
 
-    aliasAddress.s_addr = 0;
-    targetAddress.s_addr = 0;
+    aliasAddress.s_addr = INADDR_ANY;
+    targetAddress.s_addr = INADDR_NONE;
 
     icmpLinkCount = 0;
     udpLinkCount = 0;
diff --git a/usr.sbin/ppp/ppp/nat_cmd.c b/usr.sbin/ppp/ppp/nat_cmd.c
index f91ad38e633..204e5a0b78b 100644
--- a/usr.sbin/ppp/ppp/nat_cmd.c
+++ b/usr.sbin/ppp/ppp/nat_cmd.c
@@ -2,7 +2,7 @@
  * The code in this file was written by Eivind Eklund <perhaps@yes.no>,
  * who places it in the public domain without restriction.
  *
- *	$OpenBSD: nat_cmd.c,v 1.9 2000/03/31 14:32:51 brian Exp $
+ *	$OpenBSD: nat_cmd.c,v 1.10 2000/04/02 01:36:20 brian Exp $
  */
 
 #include <sys/param.h>
@@ -345,7 +345,7 @@ nat_SetTarget(struct cmdargs const *arg)
   struct in_addr addr;
 
   if (arg->argc == arg->argn) {
-    addr.s_addr = INADDR_ANY;
+    addr.s_addr = INADDR_NONE;
     PacketAliasSetTarget(addr);
     return 0;
   }
-- 
2.20.1